This category lists all events featured on ABC's Once Upon a Time.
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- Ogre Wars
- Operation Best Man
- Operation Bromance
- Operation Cobra
- Operation Cobra Part Two
- Operation Cuckoo's Nest
- Operation Firebird
- Operation Food Truck
- Operation Glass Slipper
- Operation Heartbreak
- Operation Henry
- Operation Hyacinth
- Operation Keep Your Trap Closed
- Operation Light Swan
- Operation Mixtape
- Operation Mongoose (Operation)
- Operation Next Chapter
- Operation Praying Mantis
- Operation Scorpion
- Operation We Are Both
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